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<html lang="en">
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    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      while (true) {
        let useName = prompt("请输入您的用户名");
        let password = +prompt("请输入您的密码");
        if (useName === "admin" && password === 123456) {
          alert("登入成功");
          break;
        }
      }
    </script>
  </body>
</html>
